coresight:add etb device support

Signed-off-by: liaoao <liaoao@xiaomi.com>

drivers/coresight/CMakeLists.txt

@@ -21,6 +21,10 @@
 if(CONFIG_CORESIGHT)
   set(SRCS coresight_core.c coresight_common.c)
 
+  if(CONFIG_CORESIGHT_ETB)
+    list(APPEND SRCS coresight_etb.c)
+  endif()
+
   if(CONFIG_CORESIGHT_ETM_VERSION STREQUAL "v3")
     list(APPEND SRCS coresight_etm3.c)
   endif()

drivers/coresight/Kconfig

@@ -19,6 +19,10 @@ config CORESIGHT_TIMEOUT
 	int "Timeout us for waiting register state change"
 	default 100
 
+config CORESIGHT_ETB
+	bool "ETB coresight device support"
+	default n
+
 config CORESIGHT_ETM
 	bool "ETM coresight device support"
 	default n

drivers/coresight/Make.defs

@@ -24,6 +24,10 @@ ifeq ($(CONFIG_CORESIGHT),y)
 
 CSRCS += coresight_core.c coresight_common.c
 
+ifeq ($(CONFIG_CORESIGHT_ETB),y)
+CSRCS += coresight_etb.c
+endif
+
 ifeq ($(CONFIG_CORESIGHT_ETM_VERSION),"v3")
 CSRCS += coresight_etm3.c
 endif

include/nuttx/coresight/coresight_etb.h

@@ -0,0 +1,80 @@
+/****************************************************************************
+ * include/nuttx/coresight/coresight_etb.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_CORESIGHT_CORESIGHT_ETB_H
+#define __INCLUDE_NUTTX_CORESIGHT_CORESIGHT_ETB_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/mutex.h>
+#include <nuttx/coresight/coresight.h>
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+struct coresight_etb_dev_s
+{
+  struct coresight_dev_s csdev;
+  uint32_t trigger_cntr;             /* Amount of words to store after a trigger */
+  uint32_t buffer_depth;             /* ETB buffer depth. */
+  FAR uint32_t *bufptr;              /* Buffer that ETB content sends to. */
+  mutex_t lock;                      /* Mutex for driver's open/close. */
+  uint8_t refcnt;                    /* ETB coresight device's enable count. */
+  uint8_t opencnt;                   /* ETB device's open count. */
+};
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: etb_register
+ *
+ * Description:
+ *   Register an etb devices.
+ *
+ * Input Parameters:
+ *   desc  - A description of this coresight device.
+ *
+ * Returned Value:
+ *   Pointer to an etb device on success; NULL on failure.
+ *
+ ****************************************************************************/
+
+FAR struct coresight_etb_dev_s *
+etb_register(FAR const struct coresight_desc_s *desc);
+
+/****************************************************************************
+ * Name: etb_unregister
+ *
+ * Description:
+ *   Unregister an etb devices.
+ *
+ * Input Parameters:
+ *   etbdev  - Pointer to the etb device.
+ *
+ ****************************************************************************/
+
+void etb_unregister(FAR struct coresight_etb_dev_s *etbdev);
+
+#endif  //__INCLUDE_NUTTX_CORESIGHT_CORESIGHT_ETB_H